Add regular expressions lookbehind

Brendan Eich brendan at
Wed Oct 2 14:15:58 PDT 2013

Sebastian Zartner wrote:
> I can try to help, though my time and technical knowledge about regexp 
> implementations are limited. So wouldn't someone of the people, who 
> already implemented a working regexp engine, be a better help? Did 
> somebody of you ever contact the e.g. the people behind PCRE?

Code and spec are different animals, although related. Also, JS 
knowledge (ECMA-262) matters. I've reached out to Steve Levithan, we'll see.


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